When it comes to Iron Man 3, there has been no shortage of villain rumors. At first it was denied that the Mandarin would be a villain in Iron Man 3, until a set source confirmed for Comicbook.com that Mandarin was indeed the villain. It has also been reported numerous places that Coldblood and Firepower will be villains in Iron Man 3, but there have yet to be any leaked set photos confirming these reports.

Of course, just like the Mandarin was denied in the beginning, it could be that Radioactive Man was just denied to keep fans off guard. We've seen two sources from the 2013 London Toy Fair suggest that Radioactive Man is part of the Iron Man 3 Lego sets. Brick Heroes lists Radioactive Man with a question mark as part the Iron Man 3 Malibu Mansion Attack Lego set, and Brick Fanatics describes the Iron Man 3 Malibu Mansion Attack Lego set as including “Tony Stark, Ironman mk42, Pepper Potts, Mandarin and pale green bad guy we were not allowed to know name of.”

Iron Man 3 is set to be released in theaters in the United States on May 3, 2013.